add snippet for elisp packages

snippets/emacs-lisp-mode/package

@@ -0,0 +1,12 @@
+# -*- mode: snippet -*-
+# name: Package
+# group: templates
+# key: ?package
+# contributor: Daniel Weschke
+# --
+;;; ${1:`(file-name-nondirectory (file-name-sans-extension buffer-file-name))`}.el --- ${2:Summary}  -*- lexical-binding: t -*-
+;;; Commentary:
+;;; Code:
+$0
+(provide '$1)
+;;; $1.el ends here